中国学习者英语语调单位特征研究——一项基于英语专业四级口语考试的研究

本研究采用某高等院校全国英语专业四级口语考试中的第一项（复述故事）任务作为研究对象语料,借助语音分析软件Praat对预料进行筛选、标注、分析,从而发现研究对象的独立语调单位特征主要表现在：用词量少,时长短;语调单位与句法结构的切分存在偏差;多个重读音节并存;调核音调单一,多降少升。     

音乐有效教学浅议

"有效教学",是新课程改革研究的热门话题,它是各门学科课堂教学追求的目标之一。广大音乐教师也在积极努力为寻求更有效的音乐教学方法与策略而探索与实践着。笔者认为要想真正提高音乐教学的有效性,得从教学环节的点滴做起,做好有效的课前准备,优化教学设计,追求有效的课堂实施,进行教学反思,总结经验和教训,进一步提升音乐教学的有效性。通过音乐有效教学,真正让音乐课成为开启学生心灵智慧的金钥匙。     

学术自由视域中的高校信息公开决定权

高校信息公开决定权的实质是在法律层面对高校自主权的进一步强化,其目的在于保障高校自治。高校信息公开决定权存在于高校工作的不同领域,但其行使应以学术自由为界限。为保障权力合法、有效行使,应对《高校信息公开办法》第十条第四项进行修正。     

把握学生心理问题促进学生健康成长

中等职业学校学生正处于身心发展的关键时期,他们不同程度地存在这样或那样的心理问题,影响着他们身心的健康发展。只有开展多种形式的心理健康教育才能很好地解决这些心理问题。     

以小麦再生苗叶片为外植体的愈伤组织诱导再生培养体系建立

以小麦幼胚愈伤组织为外植体,研究继代培养时间、外源激素及叶片大小对小麦试管苗叶片愈伤组织诱导和再生的影响。结果表明：继代培养1～6个月的胚性愈伤组织,有较高的再生苗频率;当生长素浓度为2,4-D2mg／L＋NAA1mg／L、叶片高度为4cm时,小麦试管苗叶片愈伤组织的诱导率最高,从而建立了小麦试管苗叶片愈伤组织诱导和再生的培养体系。     

《广绝交论》作意新探——兼论梁初荆州雍州两大集团的矛盾斗争

刘峻《广绝交论》明指到洽兄弟,实指梁武帝萧衍。萧衍齐末在雍州起兵,与荆州萧颖胄集团结成联盟,取得灭齐之战的胜利。然而荆雍两大集团间始终存在矛盾。天监三年,曹景宗等坐视原属荆州集团的司州刺史蔡道恭被围而不救,致使蔡于城中病死、司州陷落,便是这一矛盾的表现。刘峻因为得罪萧衍而仕途受阻,对萧衍衔怨很深,于是作此文暗讽。     

Surface superconductivity in the type II Weyl semimetal TaIrTe4

The search for unconventional superconductivity in Weyl semimetal materials is currently an exciting pursuit, since such superconducting phases could potentially be topologically non-trivial and host exotic Majorana modes. The layered material TaIrTe₄ is a newly predicted time-reversal invariant type II Weyl semimetal with the minimum number of Weyl points. Here, we report the discovery of surface superconductivity in Weyl semimetal TaIrTe₄. Our scanning tunneling microscopy/spectroscopy (STM/STS) visualizes Fermi arc surface states of TaIrTe₄ that are consistent with the previous angle-resolved photoemission spectroscopy results. By a systematic study based on STS at ultralow temperature, we observe uniform superconducting gaps on the sample surface. The superconductivity is further confirmed by electrical transport measurements at ultralow temperature, with an onset transition temperature (T_c) up to 1.54 K being observed. The normalized upper critical field h*(T/T_c) behavior and the stability of the superconductivity against the ferromagnet indicate that the discovered superconductivity is unconventional with the p-wave pairing. The systematic STS, and thickness- and angular-dependent transport measurements reveal that the detected superconductivity is quasi-1D and occurs in the surface states. The discovery of the surface superconductivity in TaIrTe₄ provides a new novel platform to explore topological superconductivity and Majorana modes.     

Superconductivity in chromium nitrides Pr3Cr10-xN11 with strong electron correlations

Exploration of superconductivity in Cr-based compounds has attracted considerable interest because only a few Cr-based superconductors (CrAs, A₂Cr₃As₃ and ACr₃As₃ (A = K, Rb, Cs, Na)) have been discovered so far and they show an unconventional pairing mechanism. We report the discovery of bulk superconductivity at 5.25 K in chromium nitride in Pr₃Cr_10-xN₁₁ with a cubic lattice structure. A relatively large upper critical field of H_c2(0) ∼ 12.6 T is determined, which is larger than the estimated Pauli-paramagnetic pair-breaking magnetic field. The material has a large electronic specific-heat coefficient of 170 mJ K⁻² mol⁻¹—about 10 times larger than that estimated by the electronic structure calculation, which suggests that correlations between 3d electrons are very strong in Pr₃Cr_10-xN₁₁, and thus quantum fluctuations might be involved. Electronic structure calculations show that the density of states at the Fermi energy are contributed predominantly by Cr 3d electrons, implying that the superconductivity results mainly from the condensation of Cr 3d electrons. Pr₃Cr_10-xN₁₁ represents a rare example of possible unconventional superconductivity emerging in a 3D system with strong electron correlations. Nevertheless, clarification of the specific pairing symmetry needs more investigation.     

对中学语文审美教学的几点思考

在中学语文教学中进行审美教育,不但有利于提高语文教学的质量和效率,深化语文教育的效果,促进学生学习语文的主动性和积极性,同时还有利于培养学生的审美想像力。于是,探索语文审美教学便成为中学语文教学改革的一个重要课题。一、语文教学与审美教育的关系在语文教学中实现美育,是语文教学应有之义。一方面,语文教学内容所具有的审美属性,决定了语文教学与美育有着必然的联系。即二者相互依存、互为条件,语文教学的过程必须贯穿美育,美育通过语文教学得以实现。现行的中学语文教材,80%的课文是中外文学名作佳篇。文学作品中优美的语言,不…     

Success Begins with Exploration--Zhou Changxin＇s heavy-color oil painting

With years of practice in mural and oil painting, Zhou Changxin has developed an innovative slyle of heavy-color oil painting by integratingtraditional freehand brushworks with use of thick and bright colors in Western painting.